Any tips on converting a XLSX file to HTML without using a licensed library?

• ClosedXML

  26 4,407 9.5 C#

  ClosedXML is a .NET library for reading, manipulating and writing Excel 2007+ (.xlsx, .xlsm) files. It aims to provide an intuitive and user-friendly interface to dealing with the underlying OpenXML API.

  

Time to dig into those open xml docs. Honestly it’s not that bad once you get your bearings. ClosedXML offers a somewhat thin wrapper as well. I’ve used these with great success but they are quite low level.

• Sylvan.Data.Excel

  12 164 6.6 C#

  The fastest .NET library for reading Excel data files.

Here is a simple, complete gist showing how to turn a DbDataReader into an HTML table. The WriteHtmlTable extension method can be used with any ADO.NET compatible driver, which the Sylvan.Data.Excel and Sylvan.Data.Csv libraries both support.

• InfluxDB

  www.influxdata.com sponsored

  Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

  

• Sylvan

  10 332 7.5 C#

  A collection of .NET libraries, including the fastest general-purpose CSV parser for .NET.

Here is a simple, complete gist showing how to turn a DbDataReader into an HTML table. The WriteHtmlTable extension method can be used with any ADO.NET compatible driver, which the Sylvan.Data.Excel and Sylvan.Data.Csv libraries both support.

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